398307379 has 2 divisors, whose sum is σ = 398307380. Its totient is φ = 398307378.

The previous prime is 398307319. The next prime is 398307383. The reversal of 398307379 is 973703893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398307379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398307319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199153689 + 199153690.

It is an arithmetic number, because the mean of its divisors is an integer number (199153690).

Almost surely, 2^398307379 is an apocalyptic number.

398307379 is a deficient number, since it is larger than the sum of its proper divisors (1).

398307379 is an equidigital number, since it uses as much as digits as its factorization.

398307379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 49.

The square root of 398307379 is about 19957.6396149444. The cubic root of 398307379 is about 735.7655521722.

The spelling of 398307379 in words is "three hundred ninety-eight million, three hundred seven thousand, three hundred seventy-nine".